Bag-filling machine



Feb. 7, 1928.

L. D. NELSON BAG FILLING MACHINE 2 Sheets-Sheet 1 Original Filed May 12.1926 [N VENTOR A/esom my Lea/65 D.

A TTORNEYS Feb. 7, 1928.

L. D. NELSON BAG FILLING MACHINE Original Filed May 12. 1926 2Sheets-Sheet 2 lN-VENTOR F47- 2- Lam's B) a f j A TTORNE r3 PatentedFeb. 7, 1928.

UNITED STATES PATENT OFFICE.

LEWIS D. NELSON, F CQLDWATE R, MICHIGAN, ASSIGNOR TO BATESVALVE BAG COR-PORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

BAG-FILLING MACHINE.

Original application filed May 12, 1926, Serial No. 108,504. Divided andthis application filed April 18,

1927. Serial No. 184,628.

-My improvements are. especially designed for the handling of cement,lime, flour and other heavy materials, the embodiment illustrated beingespecially designed for the handling of cement and this applicationbeing,- a division of my application for Letters Patcnt filed May 12,1926, Serial No. 108,504..

The main object of this invention is to provide in a machine of theclass described an improved feed means which is not likely to becomeclogged in use and which is of large capacity.

' Objects pertaining to details and economiesof my invention willdefinitely appear from the description to follow. The invention isdefined in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing forming a part of thisapplication, in which:

Fig. 1 is a fragmentary front perspective view of a structure embodyingthe features of my invention.

Fig. 2 is a fragmentary view partly in vertical section showing detailsof the feed means and its relation to other parts.

Fig. 3 is a detail horizontal section through the ejector on a linecorresponding to line 33 of Fig. 2.

Fig. 4 is an inverted view of the rotor.

Fig. 5 is a fragmentary edge view of the rotor on line 5-5 of Fig. 4.

In the accompanying drawing I have illustrated only such parts of myimproved filling machine as are more directly associated with the feedmechanism, the general structure being illustrated and described andclaims being made thereto in my above mentioned application for LettersPatent.

The hopper 1 is arranged so that the ma terial is fed therefrom bygravity. The structure illustrated is a multiple machine, the hopperhaving two discharge necks 2, one for each unit. At the bottomof theneck 2 is an ejector cylinder 3 open at the top to the hopper. Withinthis cylinder is 1 rotor designated generally by the numeral' 1, therotor being disposed horizontally in :he bottom of the cylinder. p

This rotor is mounted on a vertical shaft 3 supported in a bearingdesignated generilly by thenumeral 6 in the bottom of the :ylinder andby the bearing 7 on the gear 7 -which may pass around the packing gland9 is provided for are preferably inclined in both directions with thehigh points 13 at the outside of the longitudinal centers of the blades;that is, these high points are nearer the outer end of the blades thanto their inner ends.

The bottom member 11 is provided with an annular rib 14 on its undersidewhich projects into the annular groove 15 in the bottom of '@thecylinder, this serving as a bearing protecting means. At the outside ofthis protecting rib 14 the bottom plate of the rotor is provided withrib-like clearing blades 16 which are tangentially disposed relative tothe rib 14 to sweep any material edges of the rotor outwardly.

The rotor has inclined clearance grooves 17 in its periphery, thesebeing inclined rearwardly relative to the direction of rotation so thatthe material carried outwardly by the clearance blades 16 is carriedupwardly through the clearance grooves above the rotor and it is foundthat the bearings are very effectively protected by this means.

The rotor members 10 and 11 are secured together by the pins 18. Therotor member 10 has a hub-like portion 19 embracing the hub portion 20of the member 11. A hot 21 on the upper end of the shaft clamps themembers together. A retaining disk 22 is arranged under the nut tooverlap the hub 19.

The rotor-rests upon the portion 23 of the bearing 6 which is clampedbetween the rotor and the shoulder 24: on the shaft 5.

With this arrangement the parts are simple in structure and easilyassembled. Separate parts may be removed as occasion requires.

The discharge 25 of the cylinder is arranged tangentially and iscontrolled by a pair of slide valves 26 and 27. The means for operatingthese valves are not illustrated as they form no part of this inventionand are fully described in my above mentioned application.

The filler spout 28 is operatively associated with the passage 25 and isin turn controlled by a weighing mechanism which is also fully describedin my said application, of which this is a division, and is thereforenot further described herein.

While my improved feed means are especially designed by me for use inconnection with the mechanism shown in my said application for LettersPatent, the same will be found desirable and readily adapted for use inother relations. I have not attempted to illustrate and describe suchadaptations as I believe this disclosure will enable those skilled inthe art to embody or adapt the same as may be desired.

Having thus described my invention what I claim as new and desire tosecure by Let ters Patent is:

1. In a structure of the class described, the combination of ahorizontally disposed ejector cylinder open at the top and having aperipheral discharge, a bearing at the bottom of said cylinder, saidcylinder having an annular groove therein concentric with said bearing,a rotor disposed horizontally at the bottom of said cylinder bottom andcomprising a bottom plate having an an nular rib on its under sidecoacting with said groove and rearwardly curved clearance blades at theoutside of said rib, and a top plate provided with radially disposedblades, said plates having peripheral rearwardly inclined clearancepassages therein.

2. In a structure of the class described, 'the combination of ahorizontally disposed ejector cylinder open at the top and having aperipheral discharge, a hearing at the bottom of said cylinder, saidcylinder having an annular groove therein concentric with said bearing,a rotor disposed horizontally at the bottom of said cylinder andcomprising a bottom plate having an annular rib on its under sidecoacting with said groove-and rearwardly curved clearance blades at theoutside of said rib, and a top plate provided with radially disposedblades.

8. In a structure of the class described, the combination of ahorizontally disposed ejector cylinder open at the top and having aperipheral discharge, a rotor disposed hor zontally at the bottom ofsaid cylinder and comprising a bottom plate having clearance blades onits under side, and a top plate provided with radially disposed blades,said plates having a "rearwardly inclined clearance passage therein.

4. In a structure of the class described, the combination of ahorizontally disposed ejector cylinder open at the top and hav ing aperipheral discharge, a rotor disposed horizontally atthe bottom of saidcylinder and comprising a bottom plate having clearance blades on itsunder side, and a top plate provided with radially disposed blades.

5. In a structure of the class described, the combination of a hopper,an ejector cylinder disposed below said hopper and open thereto, anejector rotor disposed horizontallywithin said cylinder and providedwith radially disposed blades on the upper side thereof and clearanceblades on the under side thereof, said rotor having a clearance passageat the periphery thereof, and a shaft for said rotor disposed throughthe bottom of said cylinder and provided with a bearing, the bottom ofthe cylinder having an annular groove concentric with the shaft, saidrotor having an annular guard member on its under side rotating in saidroove.

6. n a structure of the class described, the combination of a hopper, anejector cylinder disposed below said hopper and open thereto, and anejector rotor disposed horizontally within said cylinder and providedwith radially disposed blades on the upper side thereof and clearanceblades on the under side thereof, said rotor having a clearance passageat the periphery thereof.

7. In a structure of the class described, the combination of a hopper,an ejector cylinder disposed below said hopper and open thereto, a rotordisposed horizontally within said cylinder, said rotor being providedwith radially disposed blades on its upper face, said cylinder having adischarge port in the plane of said blades, and a clearance blade on theunder side of said rotor, said rotor having a clearance passagetherethrough.

8. l a structure-of the class described, the combination of a hopper, anejector cylinder disposed below said hopper and open thereto, a rotordisposed horizontally within said cylinder, said rotor being providedwith radially disposed blades on its upper face, said cylinder having adischarge port in the plane of said blades, and a clearance blade on theunder side of said rotor.

9. In a structure of the class described, the combination of a hopper,an ejector cylinder disposed below said hopper and open thereto, a rotordisposed horizontally within said cylinder, said rotor being providedwith radially disposed blades on its upper face, said cylinder having adischarge port in the plane of said blades, said rotor having aclearance passage therein.

h Ir:1 witness whereof I have hereunto set my LEWIS. D. NELSON.

